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Dai Renchang, Pan Zhelong, Sun Hongbin, Zhang Yiwei, Zhang Boming(Tsinghua University, Beijing 100084, China)  
In order to meet the requirements of dynamic stability analysis in dispatcher training simulator (DTS). this paperproposes a series of methods to improve the dynamic stability program in DTS, such as : ① local topology analysis:② forming three sequence networks and calculating three sequence components in a selective way:③ using sparse v6ctortechnology: ④adding admittance diagonal elements with admittance of generators which are irrelative with status variables tospeed up iteration:⑤ presenting the conception of protective window to reduce time spent for protective informationcalculation:⑥ calculating dynamic result in a selective way:⑦ simulating relay protection taking account of fault type.Meanwhile, for the characteristics of DTS aiming at district network. this paper presents a new dynamic simulationprocedure: operation on fault--relay operation--operation on fault. The simulation result for a practical case illustrates thevalidity of the method and verifies that the demand of real-time simulation is satisfied.This project is supported by National Key Basic Research Special Fund of China (No. G1998020313).
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